Faraday effect in rippled graphene: Magneto-optics and random gauge fields

A beam of linearly polarized light transmitted through magnetically biased graphene can have its axis of polarization rotated by several degrees after passing the graphene sheet. This large Faraday effect is due to the action of the magnetic field on graphene's charge carriers. As deformations of the graphene membrane result in pseudomagnetic fields acting on the charge carriers, the effect of random mesoscopic corrugations (ripples) can be described as the exposure of graphene to a random pseudomagnetic field. We aim to clarify the interplay of these typically sample inherent fields with the external magnetic bias field and the resulting effect on the Faraday rotation. In principle, random gauge disorder can be identified from a combination of Faraday angle and optical spectroscopy measurements.Comment: 7 pages, 4 figure

How secular staganation can affect income class structure in european countries: institutional and policy implications

In recent years, there has been increasing debate about the low economic growth and the risk of secular stagnation in economically advanced countries. Some authors point out possible links between secular stagnation and income inequality, causally in both directions. Taking as a reference point the theoretical literature on the relationship between economic growth and income distribution, this study examines the extent to which different levels of economic growth are associated with the income class structure in European countries between 1993 and 2016, focusing on income distribution before taxes and transfers (market incomes). We highlight that in recession periods the size and income share of the middle class decrease, while the opposite occurs in periods with strong economic growth rates. Nevertheless, when growth rates are modest the patterns are much less clearly defined. Some policy and institutional implications are discussed in order to tackle the concerns of secular stagnation and inequality simultaneously.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Institutional diversity in the euro area: Any evidence of convergence?

In recent years differences in the institutional structure across euro area countries are becoming a cause of concern both for some individual Member States and for the functioning of the Economic and Monetary Union (EMU). From a global competitiveness perspective, we deal with the diversity in the institutional environment in the EMU. In particular, we assess whether the changes in the state of institutions provide convergence across euro area countries between 2006 and 2015. In addition, among the institutional indicators considered, we compute which institutional aspect contributes more to overall inequality in the state of institutions, as well as the contribution of each country to inequality considering as benchmark the country with the highest institutional quality. According to these country contributions, we highlight distinct patterns of convergence between ‘core’ and ‘periphery’ euro area countries and raise potential links between the institutional changes across euro area countries and both the differences in the intensity of the financial and economic crisis, and the policy responses in terms of fiscal consolidation applied by the respective national governments.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Teaching Model Views with UML and OCL

The specification of any non-trivial system is normally composed of a set of models. Each model describes a different view of the system, focuses on a particular set of concerns, and uses its own notation. For example, UML defines a set of diagrams for modelling the structure and behavior of any software system. One of the problems we perceived with our students is that they are able to understand each one of these diagrams, but they have problems understanding how they are related, and how the overall system specifications work when composed of a set of views. This paper presents a simple case study that we have developed and successfully used in class, which permits students developing the principal views of a system, simulate them, and check their relations.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Regulatory reforms in selected EU network industries

In the course of the 1990s, the EU has embarked on an ambitious regulatory reform programme for a number of European network industries, such as telecommunications, energy and transport. This paper analyses the potential benefits of successful reforms in these sectors with a focus on the price effects of regulatory reforms. Following a review of the existing empirical literature in this field, the paper discusses the evolution of the current regulatory framework for network industries in the EU. An empirical analysis of the main determinants of recent price developments in these industries provides evidence that regulatory reform measures had a substantial downward impact on prices in the four sectors under review.Network Industries, Panel Data, Price effects, Regulatory Reforms.

Entanglement of two qubits mediated by one-dimensional plasmonic waveguides

We investigate qubit-qubit entanglement mediated by plasmons supported by one-dimensional waveguides. We explore both the situation of spontaneous formation of entanglement from an unentangled state and the emergence of driven steady-state entanglement under continuous pumping. In both cases, we show that large values for the concurrence are attainable for qubit-qubit distances larger than the operating wavelength by using plasmonic waveguides that are currently available.Comment: 4 pages, 4 figures. Minor Changes. Journal Reference added. Highlighted in Physic

Heat production and energy balance in nanoengines driven by time-dependent fields

We present a formalism to study the heat transport and the power developed by the local driving fields on a quantum system coupled to macroscopic reservoirs. We show that, quite generally, two important mechanisms can take place: (i) directed heat transport between reservoirs induced by the ac potentials and (ii) at slow driving, two oscillating out of phase forces perform work against each other, while the energy dissipated into the reservoirs is negligibleComment: 5 pages, 4 figure

Dying with Dignity : Is This a Universal Concept?

Peer reviewedPublisher PD